Plant Biostimulant Act of 2025

The Plant Biostimulant Act of 2025 (S 1907) defines "plant biostimulants" as substances or microorganisms that improve plant growth, nutrient efficiency, and stress tolerance without relying on nutrient content. It requires the Environmental Protection Agency (EPA) to update regulations within 120 days to reflect this new definition, clarifying that biostimulants are distinct from plant regulators and nutritional products. The bill also directs the U.S. Department of Agriculture to conduct a two-year study evaluating how biostimulants enhance soil health, including reducing nutrient runoff, supporting carbon sequestration, and improving water quality. The study’s results will be reported to Congress, directly affecting EPA regulatory processes and agricultural practices involving these products.